Chronic traumatic encephalopathy (CTE) is a neurodegenerative condition associated with repeated head impacts, particularly in contact sports such as football. Current methods for identifying brain injuries rely mainly on symptom reporting and clinical observation, which can miss subtle or delayed effects. As a result, athletes may accumulate brain trauma without timely intervention, increasing their risk of long-term cognitive, emotional, and behavioural problems (Mez et al., 2017). Neuropathological studies of deceased football players have revealed a high prevalence of CTE, with severity corresponding to the level and duration of play. These findings emphasize the urgent need for real-time brain injury monitoring systems capable of detecting subclinical and cumulative brain trauma (CBT) before irreversible damage occurs.
Despite decades of research on concussion mechanics, the relationship between impact forces and brain injury remains poorly understood. Existing helmet-based systems primarily measure linear and rotational accelerations but provide limited insight into the brain’s immediate physiological response (Jadischke et al., 2013; Rowson & Duma, 2013). Similarly, clinical EEG and transcranial Doppler (TCD) ultrasound can detect neural and vascular changes, but are restricted to controlled settings, limiting real-time understanding during play. To enable continuous monitoring during athletic activity, these physiological sensors must be integrated into equipment athletes already use. Football players wear helmets routinely during training and competition, making the helmet an ideal, non-disruptive platform for embedding real-time neurophysiological monitoring.
NeuroShield addresses these gaps by integrating inertial measurement units (IMUs), dry EEG electrodes, and TCD ultrasound into a protective helmet to continuously monitor brain health during sports activity. By combining mechanical and physiological measures, NeuroShield aims to address the following knowledge gaps: which impact characteristics cause brain injury, how cumulative subconcussive exposure contributes to long-term risk, and which biomarkers can predict individual recovery trajectories.
While these technologies exist independently, integrating IMU, EEG, and TCD into a single wearable platform presents significant engineering challenges. The primary barrier is maintaining reliable electrode contact and signal quality during the high-impact, high-motion environment of contact sports. NeuroShield addresses these challenges through specialized contact interfaces, real-time artifact rejection algorithms, and automated positioning systems that enable continuous monitoring in conditions previously considered incompatible with physiological measurement.
The system emphasizes durability, automation, and real-time feedback. IMUs detect head acceleration and rotational forces with millisecond precision, EEG tracks cortical activity to identify functional disturbances, and TCD assesses cerebral blood flow for vascular changes that may persist beyond visible symptoms (Thibeault et al., 2018). Together, these measurements provide a more complete picture of brain health during athletic activity than existing tools, enabling proactive injury management and data-driven safety strategies.